Variable electric heater



, Oct. 28, 1930. A. FAZEKAS VARIABLE ELECTRIC HEATER Filed Sept. 27, 1929 //VVEN7'O/?. ANTON FAZEKAS H/S HTTOR/VEK Patented Oct. 28, 1930 UNITED STATES PATENT OFFICE ANTON FAZEKAS, OF SAN FRANCISCO, CALIFORNIA VARIABLE ELECTRIC HEATER Application filed September 27, 1929. Serial No. 395,552.

My invention relates to improvements in variable electric heaters wherein a head, adapted for insertion into preferably the lower end of a fluid container, is provided with an annular collar within which vertically disposed heating elements, each of different heating capacity, are arranged in parallel spaced relation to form a heating chamber surrounded by said heating elements and operate in conjunction with a tube within said chamber and in contact with said elements, said tube having an open upper end and entrance ports adjacent the lower end thereof, to facilitate the circulation of fluid through said tube whereby, when any or several or all of said electric heating elements are energized, fluid within said tube may be circulated and heated to various or required degrees of temperature.

The primary object of the present invention is to provide a new and improved variable electric heater for heating water quickly and economically to varying degrees of temperature.

Anotherobject is to provide a new and improved article of manufacture of the character described of simple and economic construction and of a maximum efliciency.

A further object is to provide a new and improved device of the character described having improved means for facilitating circulation of fluid through the heater by retarding circulation of said fluid within a confined chamber until a degree of temperature has been attained which will produce a pressure sufficient to forcibly eject said'fiuid from said chamber and thereby forcibly draw, or cause to be circulated through said chamber, surrounding fluid of a lower temperature.

I accomplish these and other objects by means of the improved device disclosed in the drawings forming a part of the present application wherein like characters of reference are used to designate similar parts through the specification and drawings, and in which Fig. 1 is an elevation of my improved variable heater, showing the manner of attachment to a portion of a fluid container, shown in section;

Fig. 2 is a vertical longitudinal sectional V ew taken on line 22 of Fig. 1 in the direction indicated;

Fig. 3 is a broken detailed View of one of the heating elements, partly in section;

F g. 4' is a transverse sectional view taken on line H of Fig.1 in the direction indicated;

Fig. 5 is a transverse sectional view taken on line 5-5 of Fig. 3 in the direction indicated;

Fig. 6 is a bottom plan view of the device; anc

Fig. 7 is an enlarged transverse sectional view of one of the electrical heating elements.

Referring to the drawings the numeral 1 is used to designate a portion of a fluid container having an internally threaded aperture 2 within which is screwed a head 3 provided with a'threaded portion 4 engaging the threaded aperture 2 of the container 1, said head 3 being also provided with a vertically disposed and upwardly extending annular collar 6, the purpose of which will hereinafter be more fully set forth.

The head 3 is provided with a horizontally disposed or transverse wall 7 provided with a plurality of arcuate apertures 8 arranged in circular form and below said wall 7 is a recess 9.

A plurality ofver-tic-ally disposed hollow arcuate electric heating elements 11, each of a different heating capacity, are mounted within their lower ends tightly fitted within the apertures 8 of the wall 7 and extend upwardly therefrom, said heating elements 11 being each provided with two outer layers of insulation 12 and an inner insulation 14 mounted midway between said outer layers, and in the space thus provided a suitable double resistance or heating coil 16 is provided, thus providing inner and outer heating coils 16 as disclosed in greatly enlarged section in Fig. 7 of the drawings, so that the heating elements 11 are provided with heating means for their inner, as well as their outer, surfaces.

These heating elements 11, are mounted within the arcuate apertures 8 and extend through the wall 7 and within the annular collar 6 and in parallel spaced relation to each other so as to form a heating chamber 7 A surrounded by said heating elements 11,

the spaces between said spaced heating element 11 forming entrance ports to said heat ing chamber A. By mounting the said element-S ll Wi hihba d ap tu es. 8. we W hih the atab qh 'hi sa m hts .1 are the? effectively held in proper spaced relation to each other to maintain proper spaces for entrance ports.

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5. A variable electric heater comprising a plurality of vertical electric heating elements arranged to form a central heating chamber surrounded by said elements; a tube mounted within said chamber and in contact with said elements, said tube being open at one end and closed at the other end and having apertures adjacent said closed end, whereby fluid within said chamber and tube may be ejected from the open end thereof by pressure due to expansion when said fluid is heated to a suflicient degree of temperature and thereby draw colder and denser surrounding liquid into said chamber through said apertures to facilitate circulation of fluid through said chamber and subsequent heating of the same.

6. A variable electric heater comprising a plurality of vertically disposed arcuate electric elements arranged in parallel spaced re lation to form a heating chamber surrounded by said elements; and a tube mounted within said elements and in contact therewith, said tube being open at its upper end and closed at its lower end and provided with a plurality of apertures adjacent the lower end thereof and opposite the spaces between said elements whereby fluid within said tube may be ejected therefrom by pressure due to expansion when said fluid is heated to a sufficient degree by said heating elements and thereby facilitate the circulation of fluid to be heated through said chamber.

7. A variable electric heater comprising a head adapted for insertion into the lower end of a fluid container and having an annular collar on the upper end thereof forming a chamber; a plurality of vertically disposed arcuate electric heating elements each of different heating capacity having their lower ends mounted within said collar and extending upwardly beyond the top of said collar, said elements being arranged in parallel spaced relation to form a heating chamber surrounded by said elements; and a tube mounted within said elements and in contact therewith, said tube being open at the upper end thereof and closed at its lower end seated within said head, and provided with apertures adjacent said lower ends arranged opposite the spaces between said elements to provide entrance ports for said heating chamber thus formed within the lower end of said nature.

ANTON FAZEKAS. 

